Telephone-transmitter.



Patented May 11, 1915.

E W/fnesses Q /nve n/ok- Dav/a Koen/q. by I the carbon car r on.

DAVID KOENIG, OF NEW YQRK, N. Y., ASSIGNORTO1WESTEBN5ELECTBICCOMBANY, OF

' NEW YORK, N. Y.,-A GORPOBATION-OF ILLINOIS.

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QPatentedMay antlers.

Application filed March 21, 1911. 'Serial No. 615,825.

To all whom it may concern I Be it" known that I, DAVID Konmc, subresiding at ject' of the King of Hungary, New York, in the county of New York and State of New York, have invented a certain new and .useful Improvement in Telephone- Transmitters, full, clear, concise, and exact description.

Myinvention relates to telephonetransmitters and its object is tO'PIOVldGh simplified and improved construction for-conducting away the heat generated in such instru ments whereby the strength of current may be increased more sensitive and mission of speech. 7

According to the invention, the carbon chamber is surrounded by a large block of good conducting material having a flaring opening formin the side Walls of the chamber. The smal er end of the opening is opposite and closely adjacent to the front electrode, site but not soclose to By reason of this construction, the front electrode, may be placed very close to the inner edge of the heat absorbing block and granules may lie in direct contact with the naked walls of the block Without danger of burningthe granules by excessive current at the edges of the electrodes. The invention will'bemore fully understood by reference to the; accompanying drawing'in which Figure 1 is. a rear elevation with the, casing removed of a telephone transmitter embodyi g the invention and Fig. 2 is a sectional val; of the same.

In the drawing, the elements of the transmitter are mounted on the rear side of a face plate 1, to which is attached a mouth piece 2, and inclosed within acasing 3. The transmitter elements comprise the usual diaphragm 4, front and back electrodes, 5 and 6, bridge piece 7, supportin electrode,

powerful for the transterminal blocks 8, 8 an mica diaphragm 9; The back electrode is seated in of which the following is in- Without burning the carbon granules and therefore the instrument made while the larger opening is oppothe back electrode.-

the back- 11, 12, these parts being externally and internally threaded at 13 to provide for clamping the edge of the mica diaphragm 9.

The part 11, it will be noted, has a flaring opening and thus forms with the front and back electrodes a chamber which has naked and flaring sidewalls.

permitting rapid heat conduction therefrom, is more widely separated from'the back trode, the heat generated in which is more easily taken care of by the block 10 in which it is seated. Short paths. for the current from the edge of one electrode of the other by way of. the heat conducting block part 11 are thus avoided while permitting the maximum heat conductionfrom thg StiJVfBIal parts of the'transmitter button.

0 aim:

. .1. In a telephone transmitter, an electrode chamber comprising a block .of heat-conducting material, an electrode embedded therein, a second block of heat-conducting material having a flared central opening and insulated from said first mentioned block, and an electrode flexibly supported in said opeiing opposite said first mentioned electro e.

2. In a telephone transmitter, an electrode. chamber comprising a block of heat-con ducting material having an insulated face, an electrode embedded insaid block, a second block of heat-conducting material cons. ,tiguous to said insulated face and having a flared central opening, the larger end-of which is of greater diameter than said electrode and adjacent said insulated face, and a second electrode flexibly sufpported within said opening opposite said rst mentioned electrode.

3. In a telephone transmittena pair of electrodes forming opposite Walls of a granular chamber and a block of heat conducting material having a flaring opening forming the side Walls of said chamber, the smaller end of said flaring opening being opposite andclosely adjacent one of said electrodes and the opposite end of said flaring openin being opposite the other of said electrodes but separated therefrom.

4. In a telephone transmitter, a movable and a stationary electrode, a block of heat conducting material upon which said stationary e ectrode is supported, a second to the edge The part 11, although lying close to the front electrode.

elecblock of heat conducting material having 'a. In Witness whereof, I hereunto subscribe naked flaring Wall forming the side Wall of my name this 18th day of March, A. D. 1911. a granular chamber, the larger end of said 7 wall being opposite said stationary electrode DAVID KOENIG' 5 and of larger diameter than said electrode Witnesses: I and the smaller end thereof being opposite IRVING MACDONALD,

said movable electrode. MORGAN WAsrIBURN, Jr. 

